US PATENT SUBCLASS 219 / 121.69
.~.~.~.~.~ Methods

Current as of: June, 1999
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219 /   HD   ELECTRIC HEATING

50  DF  METAL HEATING (E.G., RESISTANCE HEATING) {19}
121.11  DF  .~ By arc {16}
121.6  DF  .~.~ Using laser {12}
121.67  DF  .~.~.~ Cutting {3}
121.68  DF  .~.~.~.~ Etching or trimming {1}
121.69.~.~.~.~.~ Methods

DEFINITION

Classification: 219/121.69

Methods:

(under subclass 121.68) Subject matter including processes of etching or trimming the workpiece.